docs: def generate_hash_comment(file_path):
      """
      Read file with given file_path and return string of format
  
          # SHA1:da39a3ee5e6b4b0d3255bfef95601890afd80709
  
      which is hex representation of SHA1 file content hash
      """
      with open(file_path, 'rb') as fp:
          hexdigest = hashlib.sha1(fp.read().strip()).hexdigest()
      return "# SHA1:{0}\n".format(hexdigest)